The Impact of Urban Watershed to Hydrological Performance with The Presence of Bioretention System

Several studies have assessed the hydrological effects of bioretention at the site level.
Besides, few have examined the role played by bioretention when it is distributed
through a watershed. Stormwater runoff has been identified as one of the factors that
affect the surface runoff in urban watershed. In addition, this also resulted in increasing
the rate of impervious area and caused extreme flooding in Malaysia. Bioretention
system is known as one of the best management practices methods to reduce the
problem. The objective of this study is to investigate the impact of urban watershed to
hydrological performance with the presence of bioretention system in term of the peak
flow, runoff coefficient, and the different by having storage facilities and without
storage facilities. Furthermore, this study will also evaluate the effectiveness of
bioretention system in order to reduce the stormwater runoff in three different
condition which are pre-development, post development without BMPs and Post
development with BMPs.